Internal-combustion engine.



APPLICATION FILED FEB. 7, 1917 Patented Dea.A 4, 191'?.

' 4 SHEETS-SHEET l.

C. G. VVENNERSTROVI.

INTERNAL COMBUSTION ENGINE.

APPLICATION FILED FEB. 7, 19u

C. G. WENNERSTROVI.

INTERNAL COMBUSTION ENGINE.

APPLlcAnoN man FEB.1.1911

4 SHEETS-SHEET 3.

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INTERNAL COMBUSTION ENGINE. APPLICATION FILED FEB.7.1911

Patented Dec. 4, 1917'.

I 4 SHEETS-SHEET 4.

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CARL GUSTAV WENNERSTROM, 0F VALPARAISO, INDIANA, ASSIGNGR 0F ONE-HALF TO W. D. WEIS, OF HAMMOND, INDIANA,

nrnnlvanoorfrsusrronENGINE.

Specification of Letters Patent.

Patented Dec. 4, 1917..

Application filed. February 7, 1917. Serial No. 147,176.

To all whom t may concern:

Be it known that l, CARL G. VVENNER- s'raoM, a subject of the King of Sweden, and a resident of Valparaiso, county of Porter, and State of Indiana, have invented certain new and useful Improvements in nternal- Combustion Engines, of which the following is declared to be a full, clear, and exact description.

This invention relates to a twocycle internal combustion engine, and its principal `objects are to provide improved means for feeding van explosive mixture to the combustion chamber.

The invention consists in the several novel features of construction, arrangement `and combination of parts hereinafter fully set forth and more particularly defined in the claims.

rlhe invention is clearly illustrated in the drawings' accompanying this specification, in which:

Figure 1, is a view partly in side elevation and partly in central, vertical, longitudinal section, taken through the cylinder and frame of an internal combustion engine embodying a simple form of the present invention; Fig. 2, is a view similar to Fig. 1, with the moving parts shown in a different position; Fig. 3, is a detail view, partly in side elevation and partly in central, vertical, longitudinal section, through the valve mechanism; Fig. 4, is a view similar to Fig. 3, but showing the moving parts in a different position; Fig. 5 is a view similar t0 Fig. 4, but showing themoving mechanism in the position occupied at the end of the inward sleeve stroke; Fig. 6, is `a view similar to Fig. 3, showing the parts in a position occupied when the inlet port to the combustion chamber is closed; Fig. 7, is a vertical cross section taken on the line 7-7 of Fig. 3; Fig.` 8, is a view of the engine, partly in plan and partly in horizontal section; Fig. 9, is a detail side view of the crank shaft .and connecting rod partly broken out; Fig. 10, is a detail vertical section taken on the line 10-10 of Fig. 8; Fig. 11, is a side elevation of a certain valve housing; Fig. 12, is a longitudinal section through a fragment of the housing shown in Fig. 11; Fig. 13, is a vdetail cross section through the inlet port to said housing, the line of section Abeing indicated at 13-13 in Fia .3; Fie 14,1 is e @steil .vrees secties taken on the line 14-.14 of Fig. 12; Fig. 15, is a detail cross section taken on the line 15-15 of Fig. 12; Fig. 16, is a detail plan of certain valve actuating members; Fig. 17, is a plan of certain detents and an .arm which coperate with the valve actuating members seen in Fig 16; Fig. 18, is a detail cross section taken on the line 18-18 of Fig. 3 Fig. 19, is a perspective view of one of the valve actuating members seen in Fig. 16; Figs. 20, 21, are perspective views of a hook member seen in Fig. 16; Figs. 22, 23, are perspective views of .a certain detent and arm shown in Fig. 17, and Fig. 24, is a detail horizontal section taken on the line 24-24 of Fig'7.

Referring to said drawings which illustrate the preferred embodiment of this invention, the reference numeral 1, designates the cylinder of the engine which is surrounded by a water jacket 2, which parts may, if desired, be cast integral with the main frame 3. (See Figs. 1, 2 and 8.) The engine may consist of a, single cylinder or of a plurality of cylinders, and it is preferable to have the cylinders arranged in pairs opp-osite one another so that the moving parts in each cylinder can be connected to the same crank on the same crank shaft.

Secured to the head 13, of the cylinder, is a valve casing 30, in which is contained the valve mechanism, and leading into said valve casing 30, is the inlet port 5, (see Fig. 8) through which a combustible mixture is forced at a pressure of .about fifteen p-ounds above atmospheric pressure by a suitable pump, (not shown). rlhe combustible mixture enters the combustion chamber in the cylinder through a housing 6, which is slidably mounted in the head 13, of the engine, and has an inlet port 24a at its outer end contr-oiled by an inwardly opening check valve 24 (see Fig. 13). Said housing is also formed with ports 7, in its wall, through which the combustible mixture enters the combustion chamber of the engine.

Nithin the cylinder 1, is a reciprocatory sleeve 11, to the head l2, of which is secured the housing 6, and in said sleeve 11, is the piston 10, which reciprocates in said sleeve. rlhe exhaust port from the cylinder is shown at 8, (see Figs. 1 and 2) and the sleeve 11, has an exhaust port 9, `adapted to register with it during the exhaust strokes. The piston 10, is connected to the crank 16, of the Creek Shaft 14, by a connecting rod 1,5,

and the sleeve 11, is connected to a crank 18, of the crankshaft 14, by a connecting rod 17, which is formed at one end with a yoke 17a, having a vertically extending opening in which is guided a slide bearing 4, which surrounds the crank 18. Said crank 18, is set at a point approximately degrees behind the crank 16, and the throw of said crank 18, is preferably less than half of the throw of the crank 16. As a result, the piston 10, has a long stroke, whereas the sleeve 11, has a comparatively short stroke. Wheretwo engines are employed on oppositesides of the crank shaft, the connecting rod 15a, 0I the other engine may be connected to the connecting rod 15, by an arcuate head' 21, formed concentric with the crank16, and secured in arcuate grooves 20, formed on the connecting rod 15, as clearly indicated in Figs. 8 and 9.

Slidably mounted in the housing 6, is a tube 28, which has an opening registering with the valve controlled inlet opening 24a, of the housing 6 (see Fig. 13), and in the operation ofthe engine, said tube covers and uncovers the ports 7, betweenthe housing and combustion chamber of the engine. Slidably mounted in a centrally located guide 23a, formed integral with the housing, is the valve stem 23X, of a puppet valve 23, which stein is secured to the head of the tube 28, as is clearly indicated in Figs.V 3, and 4. Said puppet valve is arranged to seat upon a valve seat carried in the head 12, of the sleeve 11, to thereby close a port 22, formed in the housing 6. Said port 22, when uncovered, establishes communication between the head of the cylinder 1, and the head of the piston 10, and during the operation of the machine, the valve 23, is unseated during the explosion strokes. The tube 28, and valve 23, are spring pressed in a direction to vseat the valve 23, and simultaneously un- Vand 12)k which is bolted or otherwise secured to the head 12 of the sleeve 11, and ports 25, are formed in the side wall of the sleeve 6, which ports 25, open directly from the port 22.

Secured to the cylinder head 13, is the base 32X, of a guide frame, having two guide bars 32, 33, upon which is slidably mounted a valve actuating member 31, having an arm 34, which projects into the path of movement ot' the stem 23X of the puppet valve 23, and acts to unseat said valve 23. Pivotally connected to said valve actuating member 31is ahook member 36, that has a hook 36a which is, arranged to engage with shoulders 37 38, formed on a collar 37a, which is secured upon the housing 6. Said hook member 36, preferably is formed with two arms 36X, (see Figs. 20, and 21) that straddle the valve actuating member 31, and are pivotally connected to said member by a pin Secured to the guide bar 33, is a bar 49, (see Figs. 3, and 4) which has a beveled end 49"'1, arranged to engage a beveled shoulder 38", formed on the hook member 36, to thereby retract it from its connection with the shoulder 38, of the housing. (1o-acting beveled lugs 47, 47", formedon the hook member 36, and base 32, of the guide bars, co-act to disengage the hook member 36, from the shoulder 37, of the housing in ease of back tire from the engine. Below the valve actuating members 31, 36, are detenta 39, 40, and an arm 41, (see Figs. 3, 22, and 23,) which are pivotally supported upon a pin 42, supported by a bar 42X, on the ends of bars 32, 33, and said detents 39, 40 and arm 41, are spring pressed toward the hook member 36, by springs 43, secured to the inner face oit the valve casing 30. The de tents 39, 40, have shoulders 39, which are adapted to engage with the beveled end 38, of the hook member 36, to thereby hold said hook member stationary during a portion o'l'j the cycle. The spring pressed arm 41, lies between the d-etents 39, 40, and acts to press the hook member 36, into engagement with the shoulder 38, of the housing 6. A. lug 41", (see Figs. 3, and 4) limits the upward movement of the detents 39, 40, and arm 41.

A shock absorber is provided for the valve actuating members 31, 36, and may comprise a bar 46, (see Figs. 18, and 24) guided between the guide bars 32, 33, and having its ends secured to plungers 46X, that bear against coiled springs 46, which are contained in tubular members 48, secured to the engine head 13. In the operation of the machine, the valve actuating member 3l, strikes against the bar 46, ot the shock ab` sorber, just before the hook member 36, is released trom the shoulder 38, thereby lessening the tension of the spring 27, and consequently lessening the wear on the hook member 36, and shoulders 37, 38.

In the operation ot the engine., and as- 1 suming the parts to be in the position indicatel in Fig. 1, where the piston has just overlapped and closed the exhaust port 9. of the sleeve 11, and assuming that the pis ton and sleeve are both moving toward the L' inner end of their strokes, with the crank for the sleeve at a point about 7 degrees behind the crank for a piston, when the piston has closed the exhaust port 9, the

valve stem oi the puppet valve 23, comes into L f contact with the arm 3l, ot the valve actuating member 31, which at this time is held stationary by reason of its engagement with the shoulders 39a, of the detente 39, 46. The

valve 23, and tube 28, are thereby arrested,

and the continued onward movement of the sleeve 11, and therewith the housing 6, causes the puppet valve 23, to become unseated, and the ports 7, to become closed, and establishing communication between the cylinder head 13, and head of the piston 10, through ports 25, 22. (See Fig. During the portion of the stroke just described, the hook 36, of the hook member 36, is Vin sliding contact with the face of the collar 37', between the shoulders 37, 38, and as the housing continues to move onward, the shoulder 38, reaches the hook 36a, whereupon the spring pressed arm 40, swings the hook member 36, upward, bringing the hook 36a, behind the shoulder 38, and releasing said hook member from the detents 39, 40, as clearly indicated in Fig. 3. From the time the port 22, was opened the piston compresses the charge and when the piston has completed its inward stroke, the mixture is ignited by means of a spark plug 45.

vrlhe piston thereupon commences its working stroke-but the sleeve proceeds inward, the ignited gases passing through the port 22, which should be large enough to prevent friction or back pressure on the sleeve head. By reason of the engagement between the hook member 36, and shoulder 38, the spring 27, is prevented from closing the puppet valve, and its stem (during the onward movement of the sleeve 11, and housing 6) moves the valve actuating member 31, and hook member 36, along the guide rods 32, 33, until at the end of the inward stroke of the sleeve, the beveled end 38h, of the hook member 36, strikes the beveled end 49X of bar 491, and the hook member 36, is thereupon moved out of engagement with the shoulder 38, as is seen in Fig. 4, whereupon the spring 27, forces the tube 28, and puppet valve 23, toward the left, and therewith the valve actuating member 31, and hook member 36, at the same time seating the valve 23, which position is clearly indicated in Fig. 5. Upon being pushed forward by the spring 27, the valve actuating member 31, strikes the bar 46, of the shock absorber.

With the valve 23, closed, and the ports 7, uncovered by the tube 28, the sleeve 11, begins its suction stroke. The crank for the piston has now reached a point about 75 degrees beyond the dead center, and the sleeve 11, is being pulled against pressure, but by reason of the long and short stroke cranks, the sleeve is moving slowly in comparison with the movement of the piston, so that expansion will be carried out to the same extent as usual. During this suction stroke of the sleeve 11, a fresh mixture is drawn in through the valve controlled port 24a, of the housing 6, and through the ports 7, into that portion of the combustion chamber between the cylinder 'head 13, and sleeve head 12. When the crank for the piston reaches a point of about 30 degrees ahead of its outer dead center, the port 9, of the sleeve 11, reaches the exhaust port 8, and this position is seen in Fig. 2. rlhe sleeve continues its outward stroke with the housing 6, moving therewith, and the hook member 36, having been released from the shoulder 38, will be caught by the shoulder 37, and be pulled back toward the cylinder head until the end 38h, passes the shoulders 39a, of the detents 39, 40, at the outward end of the stroke of the sleeve, and said position of the valve mechanism is seen in Fig. 6. During this portion of the cycle, the piston is being moved on its inward stroke, thereby, together with vthe sleeve 11, forcing the burnt gasses out through the ports 9, 8. During this portion of the stroke of the sleeve, the valve 23, .is kept closed, and

after both cranks have passed their outward dead centers, both the sleeve and piston continue to travel upon their .inward stroke until they reach the position shown in Fig. 1 whereupon the same operation is repeated.

Thile l have herein shown and described, for the purpose of illustration, one form of the invention, it is to be understood that l do not desire to limit myself to the exact form of construction disclosed, but that extensive modifications may be made in the illustrated embodiment of the invention without departing from the spirit thereof, and intend in the following claims to point out all of the invention disclosed.

I claim as new, and desire to secure by Letters Patent:

1. In a two cycle internal combustion engine, the Vcombination of a cylinder having intake and exhaust ports, a headed sleeve reciprocating in said cylinder, and having a valve controlled port through its head, and an exhaust port capable of registering with the exhaust port of the cylinder, a piston reciprocating in said sleeve, and a crank shaft having two cranks, one connected to the sleeve, and one to the piston, the crank for the sleeve being set less than ninety degrees behind the crank for the piston.

2. In a two cycle internal combustion engine, the combination of a cylinder having intake and exhaust ports, a headed sleevey reciprocating in said cylinder, and having a valve controlled port through its head, and an exhaust port capable of registering with the exhaust port of the cylinder, a piston reciprocating in said sleeve, and a crank shaft having two cranks, one connected to the sleeve and one to the piston, the crank for the sleeve being set approximately seventy-five degrees behind the crank for the piston.

3, ln a two .cycle internal combustion engine, the combination of a cylinder having intake and exhaust ports, a headed sleeve reciprocating in said cylinder, and having a valve controlled port through its head, and an exhaust port capable of registering with the exhaust port of the cylinder, a piston reciprocating in said sleeve, a crank shaft having a long stroke crank and a short stroke crank, one connected to the sleeve, and one to the piston, the crank for the sleeve being set less than ninety degrees behind the crank for the piston.

4l. In a two cycle internal combustion engine, the combination of acylinder having intake and exhaust ports, a headed sleeve reciprocating in said cylinder and having a valve controlled port in its head and an exhaust portcapable of registering with said cylinder exhaust port, a piston sliding in said sleeve, a crank shaft having a crank driven by said piston, and aeshort stroke crank located approximately seventy-live degrees behind the first mentioned crank for reciprocating said sleeve. Y

5. In la two cycle internal combustion engine, the combination of a cylinder having .intake and exhaust ports, a headed sleeve reciprocating therein, and having a housing extending out through the cylinder head, said housing having a valve controlled port opening from the intake to the combustion chamber of the cylinder, and the head of the sleeve having a valve controlled port for establishing communication between the two sides of the sleeve head, a piston reciprocating in said sleeve, a crank shaft operatively connected to the piston and means moved by the shaft for reciprocating the sleeve.

6. In a two cycle internal combustion engine, the combination of a cylinder having intake and exhaust ports, a headed sleeve reciprocating in said cylinder and having an exhaust port capable of registering with the exhaust port of the cylinder, a tubular housing mounted in the head of said sleeve, and extending out through the head of the cylinder, and having ports opening to the combustion chamber olf the cylinder, a valve controlled port in the head of said sleeve, means for opening and closing said ports, a piston reciprocating in said sleeve, a crank shaft having two cranks, and connecting rods for connecting said sleeve and pistons to said cranks. Y

7. In an internal combustion engine, the combination of a cylinder having intake and exhaust ports, a. headed sleeve reciprocating therein, and having an. exhaustport capable of registering with the exhaust port of the cylinder, a tubular housing carried by the head of the sleeve and extending out through the cylinder head, said housing having a port opening from the interior of the housing :to the combustion chamber of the engine, a tube for opening and closing said port, tube reciprocating means, a valve secured to said tube and adapted to cover and uncover a port in the sleeve head, a piston reciprocating in said sleeve, and a crank shaft connected to said piston, and having a crank connected to said sleeve.

8. In a two cycle internal combustion engine, the combination of a cylinder having intake and exhaust ports, a sleeve reciprocating in said cylinder, and having an exhaust port capable of registering with the exhaust port of the cylinder, a housing secured to said sleeve head and extending out through the cylinder head, said housing hav ing a valve controlled inlet port and a valve controlled outlet port communicating with the combustion chamber of the engine, and said sleeve head having a valve controlled port between the two sides of the sleeve head, means for uncovering the second named port of the housing during the suction strokes, and means for opening the port between the two sides of the sleeve head during the compression and expansion strokes.

9. In a two cycle internal combustion cngi'ne, the combination of a cylinder having intake and exhaust ports, a headed sleeve reciprocating` in said cylinder, and having an exhaust port capable of registering with the exhaust port of the cylinder, a tubular housing secured to the sleeve head and extending out through the cylinder head, and having a valve controlled inlet port and a valve controlled outlet port leading to the combustion chamber of the engine, a puppet valve for controlling a port between the two sides of said sleeve head, said puppet valve having a stem projecting out through the end of the housing, a coiled compression spring for simultaneously seating said puppet valve and opening the valve for the outlet port of the housing, a valve actuating member, means for holding the same stationary during part of the suction stroke, means for operatively connecting said valve actuating means with the housing, so as to move therewith during part of the compression and working strokes, and a piston reciprocating in said sleeve, said piston and sleeve being connected to a crank shaft.

l0. In a two cycle internal combustion engine, a cylinder, a sleeve reciprocating there in, a. tubular housing secured to said sleeve, and movable through the head of the cylinder, said housing having a valve controlled port in its wall arranged to communicate with the interior of the cylinder, and a valve controlled port arranged to establish communication between the interior of the cylinder and sleeve, and valve operating means.

ll. In a two cycle internal combustion engine, a cylinder, a sleeve reciprocating therein, a tubular housing secured to said sleeve and projecting out through the head of said cylinder, said housing having an inlet port at one end, and a valve controlled port in its side wall arranged to communicate with the combustion end of the cylinder, and a valve controlled port for establishing communication between both sides of the head of the sleeve, and a valve actuating member for both valves for said orts.

12. 1n a two cycle internal combustion engine, a cylinder, a sleeve reciprocating therein, a tubular housing secured to said sleeve and projecting out through the cylinder head, said housing having an inlet port at one end, and a port in its wall at the other end arranged to communicate with the combustion end oi the cylinder, a tubular valve member sliding in said housing and arranged to cover and uncover said second named port, said housing having a port leading through the sleeve head, a puppet valve arranged to open and close said last mentioned port, and having a stem secured to said tubular valve member, a spring for seating said puppet valve, and simultaneously uncovering the port in the side wall of the housing, and a releasable valve arresting member, lying in the path of movement of said stem of the puppet valve.

13. ln a two cycle internal combustion engine, a cylinder, a sleeve reciprocating therein, a tubular housing secured to said sleeve and projecting out through the cylinder head, said housing having an inlet port at one end, and a port in its wall at the other end arranged to communicate with the combustion end of the cylinder, a tubular valve member sliding in said housing and arranged to cover and uncover said second named port,

said housing having a port leading through the sleeve head, a puppet valve arranged to open and close said last mentioned port, and having a stem secured to said tubular valve member, a spring for seating said puppet valve and simultaneously uncovering the port in the side wall of the housing, a releasable valve arresting member, lying in the path of movement of said stem of the puppet valve, and shock absorbing means lying in the path of movement of said valve arresting member. y

14. In a two cycle internal combustion engine, a cylinder, a sleeve reciprocating therein, a tubular housing secured to said sleeve and projecting out through the' cylinder head, said housing having an inlet port at one end, and a port in its wall at the other end arranged to communicate with the combustion end of the cylinder, a tubular valve member sliding in said housing and arranged to cover and uncover said second named port, said housing having a port leading through the sleeve head, a puppet valve arranged to open and close said last mentioned port, and having a stem secured to said tubular valve member, a spring for seating said puppet valve, and simultaneously uncovering the port in the side wall of the housing., and a releasable valve arresting member, lying in the path of movement of said stem of the puppet valve having a hook member' lying in the path of movement of shoulders carried by said housing, and spring pressed means for moving said hook member into engagement with said shoulders, whereby said valve arresting member vis caused to travel with said housing during part of the charging strokes.

15. In a two cycle internal combustion engine, a cylinder, a sleeve reciprocating therein, a tubular housing secured to said sleeve and projecting out through the cylinder head, said housing having an inlet port at one end, and a port in its wall at the other end arranged to communicate with the combustion end of the cylinder, a tubular valve member sliding in said housing and arranged to cover and uncover said second named port, said housing having a port through the sleeve head, a puppet valve arranged to open and close said last mentioned port, and having a stem secured to said tubular valve member, a spring for seating said puppet valve, and simultaneously uncovering the port in the side wall of the housing, a releasable valve arresting member, lying in the path of movement of said stem of the puppet valve having a hook member pivoted thereto and arranged to engage with shoulders on the housing, whereby the valve arresting member is caused to travel with the housing during the charging strokes, spring pressed detents for arresting movement of said valve arresting member and hook member, and a spring pressed arm for releasing said hook member from said detents and moving it into engagement with one of said shoulders on the housing.

1n testimony whereof, Ihave signed my name to this specification, in the presence of two subscribing witnesses.

C. GUSTAV WENNERSTROM.

Witnesses:

WM. W. MCMAHON, Gr. W. FITE..

topics gt' this patent may be obtained for ve cents each, by addressing the Coissloner ot Patente,

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